#include "apue.h"
#include<pthread.h>

pthread_t ntid; 

void printids(const char *s){
    pid_t pid;
    pthread_t tid; 

    pid = getpid();
    tid = pthread_self();

    printf("%s pid %u tid %u (0x%x)\n", s, (unsigned int)pid, 
            (unsigned int)tid, (unsigned int)tid);
}

void *thread_fun(void *arg){
    printids("new thread:");
    return ((void *)0);
}

int main(void){
    int err;

    err = pthread_create(&ntid, NULL, thread_fun, NULL);
    if (err!=0)
        printf("can not create new thread %s\n", strerror(err));
    printids("main thread:");
    sleep(1); 
    return 0;
}
